Posted in

What is the maximum number of users that 4G LTE Poc Radio can support in a group?

by louis•

If you’re someone who’s ever had to coordinate a large field crew – say, a construction site, a security detail, or a event staffed across a massive festival grounds – you’ve probably hit a wall with regular two-way radios. They cut out, lag, or just plain stop working when you need 10, 20, or 50 people on the same channel. That’s where 4G LTE Poc (Push to Talk over Cellular) radios come in, and a question I get all the time is: “What’s the maximum number of users a 4G LTE Poc radio can handle in one group?” 4G LTE Poc Radio

As a supplier of these radios, I can’t just throw out a random number – because it’s not that simple. The answer depends on a bunch of stuff, and over the years, I’ve seen firsthand how even small shifts in setup can make a huge difference. Let’s break this down like we’re chatting over a coffee (no boring jargon, promise).

First, let’s get the basics straight: 4G LTE Poc radios work by piggybacking on existing cellular networks, unlike traditional UHF/VHF radios which are limited to a local frequency range. That means their group size isn’t tied to a hardware frequency cap – it’s tied to the network’s capacity, how the Poc platform is set up, and what your crew actually needs to do.

Here’s the thing most people don’t realize: a “group” in Poc terms isn’t just a list of numbers you add to an app. It’s a dynamic, live feed of audio, maybe some text messages, location pins, and even video if you’re using the right radios. Every single user on that group is sending a tiny chunk of data when they press the PTT (Push to Talk) button, and receiving the same feed as everyone else. So the math here is all about how much data the network can handle at once, plus how your Poc server is configured.

Let’s start with the sweet spot most of our customers see: for everyday use, groups of 100 to 150 users are totally standard, no issues. I’ve got a construction client out in Arizona with 120 field supervisors, safety officers, and equipment operators all on one Poc group, and they’ve never complained about lag or dropped calls. Another customer is a festival security team – they had 110 guards on the same group during a 3-day country music festival last summer, and even when everyone was talking at once (which happens when a crowd surge is reported), it held up.

But wait, what if you need way more? Say 300, 500, even 1,000 users in one group. Is that possible? Technically, yeah – but only if you set it up right. I’ve seen a logistics company use a private 4G LTE network (think a dedicated cellular tower just for their business) to run a Poc group of 800 warehouse and delivery drivers. Their setup didn’t rely on public Verizon or T-Mobile; they had their own spectrum, so they could carve out enough bandwidth to handle all those PTT feeds without any crowding.

Here’s where people mess up: if you try to cram 500 users onto a public consumer cellular network, you’re gonna have a bad time. Public networks are built for people browsing Instagram, texting, and making calls – not for 500 people all transmitting audio at the same time. During peak hours, like 9 AM on a weekday, that network is already stretched thin, add a big Poc group on top, and you’ll get choppy audio, people missing half of what’s said, or even the app freezing.

Let’s talk about the variables that shift that number, because that’s where it gets interesting.

  1. PTT Usage Habits – This is huge. If your group is polite, only one person talks at a time, the network barely breaks a sweat. We’ve had customers with 200 users on a group where people take turns, and it works flawlessly. But if you’ve got a rowdy group – like a construction crew troubleshooting an emergency, where 10 people are all pressing PTT at the same time – that’s way more data. In that case, you might see the sweet spot drop to 80 or 100 users, because all that simultaneous talk is eating up bandwidth.

  2. Network Type – Public vs. private, 4G vs. 5G? Wait, we’re talking 4G here, but even 4G networks have tiers. Public LTE is okay for small groups, but private LTE networks (which we help customers set up) are way more reliable for larger groups. A private network lets you allocate exactly how much bandwidth your Poc group gets, so even if you have 500 users, you can make sure there’s enough data for every PTT message. Some of our mining customers use private LTE networks for 400+ miners on one Poc group, and they never have issues – even underground, where public cell signals don’t reach.

  3. Platform Configuration – Not all Poc servers are the same. Some off-the-shelf Poc platforms are designed for small businesses, so they cap groups at 200 users max. But the ones we supply are on enterprise-grade servers that can scale way higher – if you’ve got the network to back it up. We’ve had a municipal government client set up a group of 600 emergency responders during a parade, using our Poc radios, and it worked because we tuned the server to prioritize their group’s traffic over other data.

  4. Extra Features You’re Using – If your group is just doing PTT talk, that’s the lightest load. But if you’re adding stuff like real-time location tracking, text messaging, even video clips, that adds more data. For example, if every single user is sharing their live location, that’s a constant data stream on top of the PTT audio. So a group of 150 people with location tracking might feel like a group of 200 people only talking. We had a security team that added video streaming during a large event, and they had to split their group into two smaller groups of 120 each, because the video made the original too laggy.

Now, let’s answer the big question: what’s the absolute maximum I’ve seen a 4G LTE Poc radio group handle? I’ve seen it work for a one-off event: a customer had 1,200 people on a Poc group during a city-wide marathon, using a temporary private LTE network we rented for the weekend. But that’s a special case – temporary, dedicated spectrum, no other users on the network, and they used a “talk burst” feature that only lets one person transmit at a time, even if multiple press PTT. It worked for that event, but you can’t run that 1,200-person group every day on a public network or even a standard private network.

Most of our regular customers stick to 150 or less for daily use, because that’s where you get perfect audio, no lag, and no dropped messages. If you need more than that, we don’t just sell you radios – we help you figure out the right network setup, whether that’s adding extra bandwidth, using a private tower, or splitting your group into smaller sub-groups that can communicate with each other. For example, if you have 300 users, split them into two groups of 150, and use a dispatch feature that lets a supervisor talk to both groups at once. That way, you get the reliability of smaller groups without losing the ability to coordinate the whole crew.

I should also mention that there’s a difference between “the number of users on a group” and “active users at the same time.” A lot of people ask for max number, but they forget that not everyone is talking at once. Even if you have 300 users registered to a group, only 10 or 15 will be pressing PTT at any given time. That’s a key point – the max number isn’t about how many are registered, it’s about how many are transmitting at the same time. We’ve had a customer with 400 registered users, but at peak, only 20 are talking, so it works perfectly on a public network. That’s a way better metric to look at than total registered users.

So, if you’re trying to figure out what works for your team, here’s a quick cheat sheet I give all our customers:

  • 10–50 users: Any 4G Poc radio will work, even on public LTE. No issues at all.
  • 50–150 users: Still solid on public LTE, just make sure the network is strong in your area (no dead zones for your crew).
  • 150–300 users: Best to go with a private network or a dedicated cellular plan for your Poc group, to avoid network congestion.
  • 300+ users: You’ll almost certainly need a private LTE network, and we can help you design that – we’ve done it for warehouses, mines, and event companies.

Now, why does this matter to you? If you’re overestimating your group size, you might waste money on expensive infrastructure you don’t need. If you’re underestimating, you’ll end up with radios that work for 50 people but fall apart when you have 100. As a supplier, I’m not here to sell you the biggest, fanciest setup – I’m here to get you something that works for your actual crew. For example, a landscaping company I work with has 80 gardeners and office staff, so they go with our standard Poc radios and a public plan, and that’s way cheaper than a private network. A construction company with 250 workers spread across a 10-acre site needs that private network, because their public signal is spotty and they can’t afford missed safety calls.

One thing I hear a lot is, “Why can’t it just handle 1,000 people?” The answer is that cellular networks are built for millions of users per city, but each group’s data needs add up. Think of it like a highway: one car is fine, 100 cars are okay, but 1,000 cars at rush hour cause a traffic jam. The network is the highway, and the PTT audio is the cars. You can widen the highway (private network) to fit more cars, but you still can’t fit 1,000 cars on a two-lane road.

I’ve also seen a lot of people switch from traditional analog radios to 4G Poc because they thought Poc would handle more users, and that’s true – analog radios usually cap at 30–50 users on one channel, because of frequency interference. So even a small Poc group is way better than analog, and once you get to 100+, Poc blows analog out of the water.

If you’re in a spot where you’re trying to pick between radios, here’s a tip: ask the supplier about “group scalability” – not just “how many users can it hold,” but “what do I need to do to run a group of X users.” That’s where the good suppliers separate themselves. We don’t just say “1000 users max” – we say, “If you need 500, here’s what you’ll need: a private LTE module, this network setup, and we’ll walk you through it.”

At the end of the day, the maximum number of users isn’t a hard number. It’s a balance between your crew size, how often they talk, the network you use, and the features you need. I’ve seen groups that work with 200 on public LTE, and others that struggle with 80 because they all talk at once. That’s why I never give a one-size-fits-all answer.

If you’re in the market for 4G LTE Poc radios and you’re trying to figure out what group size will work for you, feel free to reach out to our team to chat through your needs. We’ve helped all kinds of clients – from small construction crews to large event security – set up groups that work without the lag or stress. No sales pitches, just straight talk about what will actually work for your team.

Analog Radio References:

  1. 3GPP TS 23.179: LTE Push-to-Talk over Cellular (PoC) System Architecture and Functional Description.
  2. Private LTE Association: “Scalability of Push-to-Talk over Cellular on Private Networks”, 2022.
  3. Federal Communications Commission (FCC): “LTE Network Capacity for Mission-Critical Push-to-Talk Services”, 2021.
  4. Poc Industry Working Group: “Best Practices for Group Size Optimization in PoC Deployments”, 2023.

Jingtong (Quanzhou) Electronics Co., Ltd.
We are one of the most professional 4g lte poc radio manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy durable 4g lte poc radio made in China here from our factory. For price consultation, contact us.
Address: No.288, Si Huang Industry Zone, Xia Mei Town, Nan An, Quanzhou, Fujian province, China 362302
E-mail: jtdjj@jtdjj.com
WebSite: https://www.jteradio.com/